I'm half-joking here. I've seen a few myself, including Maynard and Don Ellis in the 70's, Gerald Wilson's band just last Fall and even THIS one a couple of years ago. I really have no trouble with "loud".
But there is something strident (I can't think of another word, right now) about the sound of this band on CD as well as the records from the 70's. It may be the frontal assault by the trumpet section. It's not a problem, just an observation.